Ideal for framing, trim carpentry, and tile applications. Unique BOX BEAM frame does not bend or warp. 1 horizontal vial and 2 vertical vials. Crystal clear vials readable in any direction with no change in accuracy tolerance, guaranteed for life. Vial accuracy of .029 in the vial-up or vial-down position. Best frame strength-to-weight ratio. Removable endcaps for scribing in corners and for reading tight header and sill openings. Rubber endcaps grip walls and do not leave marks. Metal hang...